Lodash _.isSafeInteger() Method

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Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.

The _.isSafeInteger() method is used to find whether the given value is a safe integer or not. It returns True if the given value is a safe integer. Otherwise, it returns false. An integer is safe if it’s an IEEE-754 double-precision number(all integers from (2 ⁵³ – 1) to -(2 ⁵³ – 1)) which isn’t the result of a rounded unsafe integer.

Syntax:

_.isSafeInteger(value)

Parameters: This method accepts a single parameter as mentioned above and described below:

value: This parameter holds the value to check.

Return Value: This method returns true if the value is a safe integer, else false.

Note: Here, const _ = require(‘lodash’) is used to import the lodash library into the file.

Example 1:

// Requiring the lodash library   
const _ = require("lodash");   
       
// Use of _.isSafeInteger() method  
  
// Passing a mathematical pow function as an argument 
console.log(_.isSafeInteger(Math.pow(2, 53) - 1));  
  
// Passing a maximum value of a number as an argument 
console.log(_.isSafeInteger(Infinity));  
  
// Passing a minimum value of a number as an argument 
console.log(_.isSafeInteger(Number.MIN_VALUE));  

Output:

true
false
false

Example 2:

// Requiring the lodash library   
const _ = require("lodash");   
       
// Use of _.isSafeInteger() method  
  
// Passing a positive number as an argument 
console.log(_.isSafeInteger(123));  
  
// Passing a negative number as an argument 
console.log(_.isSafeInteger(-123));  
  
// Passing a number(with decimals) as an argument 
console.log(_.isSafeInteger(0.123));  

Output:

true
true
false

Note: This code will not work in normal JavaScript because it requires the library lodash to be installed.

Reference: https://lodash.com/docs/4.17.15#isSafeInteger

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